Hey,
yes i have it connected to HA. The Meter Pro CO2 is connected via the Switchbot Bluetooth Integration. So directly via Bluetooth without any hub.
The firmeware update can be done via the switchbot app also without the hub but i see no way todo this via HA directly.
At the moment, I think that Senseair S88 is the best.
Hi, i see this one popped up on my aliexpress page
Has anyone tried it?
DAIKIN Air Sensor BRY88AB151K/BRY88AA151K Geek to meets ESPHome Home Assistant. Sensor content temperature, humidity, CO2, PM2.5
https://a.aliexpress.com/_oo8WRB3
It seems references to AirGradient ONE are missing 
I use an outdoor version but the also offer indoor versions with all the usual measurements: temp, rh, CO2, VOC (index, not ppm) and particulate matter (PM2.5, PM10, PM0.3).
They are not cheap however (135$ for the kit) they have a very good track record of accuracy and publish very openly about advancements and also problems that arise. And it is open source hardware and directly available in HA as a local polling device 
The indoor version is bulky however, probably only useful if you put it on a wall or something. We used several AirGradient indoor at a site I was working and it was very insightful for knowing what processes are most polluting, when too many people are in the room and the ventilation cannot keep up etc.
The Switchbot CO2 Sensor seems to work reasonably well if you connect it to HA via Bluetooth. Strangely, I had to remove the batteries from my unit for it to work properly when connected to USB-C…
Been using the One for about a week now, can highly recommend it. I went with the fully assembled kit and the only time you need to access the web interface is for the firmware updates, everything else is local and handled via the HA integration page for it.
It’s been a boon in having a visual of the Co2 levels in my unit so I know when to open a window and to have the fan mode on the AC turned on to promote airflow more and reduce it to more safe levels.
I use this with the graph card for at a glace visuals on the side monitor and on my phone when I have it open:
type: custom:mini-graph-card
entities:
- sensor.airgradientone_carbon_dioxide
align_icon: left
align_state: center
show:
fill: true
labels: false
color_thresholds:
- value: 600
color: "#1AB24D"
- value: 1000
color: "#9BC73E"
- value: 1500
color: "#FBC711"
- value: 2000
color: "#F29126"
- value: 2100
color: "#EE1D23"
hours_to_show: 6
points_per_hour: 5
theme: Metro Blue
icon: mdi:molecule-co2
The colors and values are based on this chart:
What Entities does it expose.
I bought one to test and play around.
First I updated the FW via Smartphone and the SwitchBot App.
Then I saw that Home Assistant already found something … the SwitchBot Bluetooth integration found a “Light Strip DD90”. But the only entity it had was sensor.light_strip_dd90_bluetooth_signal
A few minutes later it added light.light_strip_dd90.
Of course, nothing can be controlled or read out with it, as the sensor is not a lamp, but a CO2 sensor with temperature and humidity sensor
yeah had the same. do you have active scans on?
or
Still looking for feedback on this, as we are planning the first production run
The Switchbot Meter Pro CO2 works perfectly now via the Bluetooth Integration.
It has since replaced my Netatmo Setup.
I am quite happy with the performance. At first it seemed a bit bugged, but with the initial Update it got a lot better and when you remove the batteries and leave it running on USB C it was been absolutely rock solid and very responsive.
We have the Aranet 4 and after reading this and other topics I added this device to HA. Now I also get temp and humidity readings as a bonus.
The Aranet 4 is expensive. We paid around 160 euros for it and prices have gone up. We needed a solid and accurate meter during COVID. But now that we have it I thought I’d just give it a try!
